Granted Patent
Utility
US 4,597,672 · App. 06/692,217
Center discharge mixer for fluent and nonfluent material
Inventors:
Benjamin R. Neier, Donald L. Stirling
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Jan 17, 1985
Inventors
Benjamin R. Neier
Donald L. Stirling
Assignee (at issue)
Stirco, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.